/Engine/Plugins/Online/OnlineServicesOSSAdapter/Source/Public/Online/SessionsOSSAdapter.h
Registry of V1 session ids in FUniqueNetIdRef format, indexed by FOnlineSessionId
typedef [TOnlineUniqueNetIdRegistry](API\Plugins\OnlineServicesOSSAdapter\Online\TOnlineUniqueNetIdRegistry)< [OnlineIdHandleTags::FSession](API\Runtime\CoreOnline\Online\FSession) > FOnlineSessionIdRegistryOSSAdapter